Big revenue + small margins in a stable business, IMO, is a massive liability for the bottom line; any downturn in business and that becomes big revenue + big losses. Even if cloud is making money, it can wipe a lot of that out.
From the point of view of running an enterprise that lasts, though, diversification is important. Financially diversification is probably, in general, bad for EPS. But if you want to run a lasting empire, it's best to not tie it to just a narrow thing.